Hey creator,

Big news: We've extended our OSS Hackathon!

You now have until September 15th, 2025 to build and submit your niche marketplace. Plus, we're moving our finalist celebration to New York City this winter!

What's new

Extended deadline: Submit by September 15, 2025 at 11:59 PM ET
Finalist celebration: Winter 2025 in New York City
Expanded prizes:
- $100K grand prize
- $5K for highest GMV
- $2.5K for most creative/unique
- $1K each to ten novel projects

What to submit

Working marketplace built on our MIT-licensed code
Documentation of your niche strategy
Verifiable creator and buyer metrics
3-minute video showcasing your marketplace

Need inspiration?

Consider building marketplaces for:

Audio professionals selling soundscapes and effects
Digital pattern creators for crafting communities
Creator mentorship and skill development
Services connecting indie authors with publishing professionals
Culinary specialists selling cooking courses

Don't miss this extended opportunity to build something incredible with our open-source code!

Happy building,

The Gumroad Team

Resources: